Patents by Inventor Robert T. Biggs

Robert T. Biggs has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Multifunctional viscosity index improver containing phenothiazine
    Patent number: 5424366
    Abstract: Multi-functional viscosity index improvers for lubricating oils containing an EPM or EPDM polymer onto which has been grafted an unsaturated functional monomer containing phenothiazine.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: June 13, 1995
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Theodore E. Nalesnik, Robert T. Biggs, Benjamin J. Kaufman
  • Multifunction viscosity index improvers
    Patent number: 5374364
    Abstract: Multifunctional viscosity index improvers for lubricating oils containing an EPM or EPDM polymer with pendant thiazoline units.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: December 20, 1994
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Nicholas Benfaremo, Robert T. Biggs
  • Multifunctional viscosity index improvers based on polymers containing sulfonamides
    Patent number: 5356999
    Abstract: Multifunctional viscosity index improvers for lubricating oils containing an EPM or EPDM polymer onto which has been grafted an unsaturated reactive monomer and thereafter reacted with amines containing sulfonamide units.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: October 18, 1994
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Benjamin J. Kaufman, Robert T. Biggs
  • Multifunctional viscosity index improver containing phenothiazine
    Patent number: 5275746
    Abstract: Multifunctional viscosity index improvers for lubricating oils containing an EPM or EPDM polymer onto which has been grafted with an unsaturated reactive monomer and thereafter reacted with amino alkylphenothiazine.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: January 4, 1994
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Benjamin J. Kaufman, Theodore E. Nalesnik, Robert T. Biggs
  • Multifunctional viscosity index improver containing phenothiazine
    Patent number: 5200100
    Abstract: Multi-functional viscosity index improvers for lubricating oils containing an EPM or EPDM polymer onto which has been grafted an unsaturated functional monomer containing phenothiazine.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: April 6, 1993
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Theodore E. Nalesnik, Robert T. Biggs, Benjamin J. Kaufman
  • Multifunctional viscosity index improver containing units from unsaturated chlorides and aromatic amines
    Patent number: 5135671
    Abstract: Multifunctional viscosity index improvers for lubricating oils containing olefin copolymers which have pendant groups derived from vinylbenzyl chloride and N-phenyl-p-phenylene diamine.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: August 4, 1992
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Theodore E. Nalesnik, Robert T. Biggs, Raymond C. Schlicht
  • Dispersant-antioxidant viscosity index improver
    Patent number: 5094766
    Abstract: Dispersant and antioxidant viscosity index improvers for lubricating oils containing an EPR or EPT polymer onto which has been graft polymerized with vinyl azlactone and thereafter reacted with N-phenyl-p-phenylene diamine.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: March 10, 1992
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Robert T. Biggs, Theodore E. Nalesnik
  • Dispersant-antioxidant multifunctional viscosity index improver
    Patent number: 5021177
    Abstract: Dispersant viscosity index improvers for lubricating oils contain an EPR or EPT polymer onto which has been graft polymerized with isocyanatoethyl methacrylate and thereafter reacted with N-phenyl-p-phenylene diamine.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: June 4, 1991
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Thomas F. Derosa, Robert T. Biggs, Theodore E. Nalesnik
  • Dispersant anti-oxidant VI improver and lubricating oil composition containing same
    Patent number: 4948524
    Abstract: An additive composition prepared by reacting a polymer prepared from ethylene and at least one C.sub.3 -C.sub.10 alpha-monoolefin and optionally a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene from about 20 to 85 mole percent of said C.sub.3 -C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene and having an average molecular weight ranging from about 5,000 to 500,000 with a nitrosodiphenylamine compound represented by the formula: ##STR1## in which R and R.sup.1 represent hydrogen or an alkyl, alkenyl, or alkoxyl radical having from 1 to 8 carbon atoms, and a lubricating oil composition containing same is provided.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: August 14, 1990
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Theodore E. Nalesnik, Robert T. Biggs, Harry Chafetz, Christopher S. Liu